/*
* Copyright (C) 1999 WIDE Project.
* All rights reserved.
- *
+ *
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
- *
+ *
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* SUCH DAMAGE.
*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifndef lint
+static const char rcsid[] =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.39 2002-07-22 14:09:07 hannes Exp $";
+#endif
+
#include <sys/param.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
-#include <netinet/in_systm.h>
-#include <netinet/ip.h>
-#include <netinet/ip_var.h>
-#include <netinet/udp.h>
-#include <netinet/udp_var.h>
#include <errno.h>
#include <stdio.h>
+#include <string.h>
+#include <netdb.h>
#include "interface.h"
#include "addrtoname.h"
+#include "extract.h"
struct bgp {
u_int8_t bgp_marker[16];
#define BGP_UPDATE 2
#define BGP_NOTIFICATION 3
#define BGP_KEEPALIVE 4
+#define BGP_ROUTE_REFRESH 5
+
+static struct tok bgp_msg_values[] = {
+ { BGP_OPEN, "Open"},
+ { BGP_UPDATE, "Update"},
+ { BGP_NOTIFICATION, "Notification"},
+ { BGP_KEEPALIVE, "Keepalive"},
+ { BGP_ROUTE_REFRESH, "Route Refresh"},
+ { 0, NULL}
+};
struct bgp_open {
u_int8_t bgpo_marker[16];
u_int8_t bgpo_optlen;
/* options should follow */
};
+#define BGP_OPEN_SIZE 29 /* unaligned */
+
+struct bgp_opt {
+ u_int8_t bgpopt_type;
+ u_int8_t bgpopt_len;
+ /* variable length */
+};
+#define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
struct bgp_notification {
u_int8_t bgpn_marker[16];
u_int8_t bgpn_minor;
/* data should follow */
};
+#define BGP_NOTIFICATION_SIZE 21 /* unaligned */
struct bgp_attr {
u_int8_t bgpa_flags;
#define BGPTYPE_LOCAL_PREF 5
#define BGPTYPE_ATOMIC_AGGREGATE 6
#define BGPTYPE_AGGREGATOR 7
+#define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
+#define BGPTYPE_ORIGINATOR_ID 9 /* RFC1998 */
+#define BGPTYPE_CLUSTER_LIST 10 /* RFC1998 */
+#define BGPTYPE_DPA 11 /* draft-ietf-idr-bgp-dpa */
+#define BGPTYPE_ADVERTISERS 12 /* RFC1863 */
+#define BGPTYPE_RCID_PATH 13 /* RFC1863 */
#define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
#define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
+#define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
+
+static struct tok bgp_attr_values[] = {
+ { BGPTYPE_ORIGIN, "Origin"},
+ { BGPTYPE_AS_PATH, "AS Path"},
+ { BGPTYPE_NEXT_HOP, "Next Hop"},
+ { BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
+ { BGPTYPE_LOCAL_PREF, "Local Preference"},
+ { BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
+ { BGPTYPE_AGGREGATOR, "Aggregator"},
+ { BGPTYPE_COMMUNITIES, "Community"},
+ { BGPTYPE_ORIGINATOR_ID, "Originator ID"},
+ { BGPTYPE_CLUSTER_LIST, "Cluster List"},
+ { BGPTYPE_DPA, "DPA"},
+ { BGPTYPE_ADVERTISERS, "Advertisers"},
+ { BGPTYPE_RCID_PATH, "RCID Path / Cluster ID"},
+ { BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
+ { BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
+ { BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
+ { 255, "Reserved for development"},
+ { 0, NULL}
+};
+#define BGP_OPT_AUTH 1
+#define BGP_OPT_CAP 2
-static const char *bgptype[] = {
- NULL, "OPEN", "UPDATE", "NOTIFICATION", "KEEPALIVE",
-};
-#define bgp_type(x) num_or_str(bgptype, sizeof(bgptype)/sizeof(bgptype[0]), (x))
-static const char *bgpnotify_major[] = {
- NULL, "Message Header Error",
- "OPEN Message Error", "UPDATE Message Error",
- "Hold Timer Expired", "Finite State Machine Error",
- "Cease",
+static struct tok bgp_opt_values[] = {
+ { BGP_OPT_AUTH, "Authentication Information"},
+ { BGP_OPT_CAP, "Capabilities Advertisement"},
+ { 0, NULL}
};
-#define bgp_notify_major(x) \
- num_or_str(bgpnotify_major, \
- sizeof(bgpnotify_major)/sizeof(bgpnotify_major[0]), (x))
-static const char *bgpnotify_minor_1[] = {
- NULL, "Connection Not Synchronized",
- "Bad Message Length", "Bad Message Type",
-};
+#define BGP_CAPCODE_MP 1
+#define BGP_CAPCODE_RR 2
+#define BGP_CAPCODE_RR_CISCO 128
-static const char *bgpnotify_minor_2[] = {
- NULL, "Unsupported Version Number",
- "Bad Peer AS", "Bad BGP Identifier",
- "Unsupported Optional Parameter", "Authentication Failure",
- "Unacceptable Hold Time",
+static struct tok bgp_capcode_values[] = {
+ { BGP_CAPCODE_MP, "Multiprotocol Extensions"},
+ { BGP_CAPCODE_RR, "Route Refresh"},
+ { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
+ { 0, NULL}
};
-static const char *bgpnotify_minor_3[] = {
- NULL, "Malformed Attribute List",
- "Unrecognized Well-known Attribute", "Missing Well-known Attribute",
- "Attribute Flags Error", "Attribute Length Error",
- "Invalid ORIGIN Attribute", "AS Routing Loop",
- "Invalid NEXT_HOP Attribute", "Optional Attribute Error",
- "Invalid Network Field", "Malformed AS_PATH",
+#define BGP_NOTIFY_MAJOR_MSG 1
+#define BGP_NOTIFY_MAJOR_OPEN 2
+#define BGP_NOTIFY_MAJOR_UPDATE 3
+#define BGP_NOTIFY_MAJOR_HOLDTIME 4
+#define BGP_NOTIFY_MAJOR_FSM 5
+#define BGP_NOTIFY_MAJOR_CEASE 6
+
+static struct tok bgp_notify_major_values[] = {
+ { BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
+ { BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
+ { BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
+ { BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
+ { BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
+ { BGP_NOTIFY_MAJOR_CEASE, "Cease"},
+ { 0, NULL}
};
-static const char **bgpnotify_minor[] = {
- NULL, bgpnotify_minor_1, bgpnotify_minor_2, bgpnotify_minor_3,
+static struct tok bgp_notify_minor_msg_values[] = {
+ { 1, "Connection Not Synchronized"},
+ { 2, "Bad Message Length"},
+ { 3, "Bad Message Type"},
+ { 0, NULL}
};
-static const int bgpnotify_minor_siz[] = {
- 0, sizeof(bgpnotify_minor_1)/sizeof(bgpnotify_minor_1[0]),
- sizeof(bgpnotify_minor_2)/sizeof(bgpnotify_minor_2[0]),
- sizeof(bgpnotify_minor_3)/sizeof(bgpnotify_minor_3[0]),
+
+static struct tok bgp_notify_minor_open_values[] = {
+ { 1, "Unsupported Version Number"},
+ { 2, "Bad Peer AS"},
+ { 3, "Bad BGP Identifier"},
+ { 4, "Unsupported Optional Parameter"},
+ { 5, "Authentication Failure"},
+ { 6, "Unacceptable Hold Time"},
+ { 0, NULL}
};
-static const char *bgpattr_origin[] = {
- "IGP", "EGP", "INCOMPLETE",
+static struct tok bgp_notify_minor_update_values[] = {
+ { 1, "Malformed Attribute List"},
+ { 2, "Unrecognized Well-known Attribute"},
+ { 3, "Missing Well-known Attribute"},
+ { 4, "Attribute Flags Error"},
+ { 5, "Attribute Length Error"},
+ { 6, "Invalid ORIGIN Attribute"},
+ { 7, "AS Routing Loop"},
+ { 8, "Invalid NEXT_HOP Attribute"},
+ { 9, "Optional Attribute Error"},
+ { 10, "Invalid Network Field"},
+ { 11, "Malformed AS_PATH"},
+ { 0, NULL}
};
-#define bgp_attr_origin(x) \
- num_or_str(bgpattr_origin, \
- sizeof(bgpattr_origin)/sizeof(bgpattr_origin[0]), (x))
-
-static const char *bgpattr_type[] = {
- NULL, "ORIGIN", "AS_PATH", "NEXT_HOP",
- "MULTI_EXIT_DISC", "LOCAL_PREF", "ATOMIC_AGGREGATE", "AGGREGATOR",
- NULL, NULL, NULL, NULL,
- NULL, NULL, "MP_REACH_NLRI", "MP_UNREACH_NLRI",
+
+static struct tok bgp_origin_values[] = {
+ { 0, "IGP"},
+ { 1, "EGP"},
+ { 2, "Incomplete"},
+ { 0, NULL}
};
-#define bgp_attr_type(x) \
- num_or_str(bgpattr_type, \
- sizeof(bgpattr_type)/sizeof(bgpattr_type[0]), (x))
/* Subsequent address family identifier, RFC2283 section 7 */
-static const char *bgpattr_nlri_safi[] = {
- "Reserved", "Unicast", "Multicast", "Unicast+Multicast",
+#define SAFNUM_RES 0
+#define SAFNUM_UNICAST 1
+#define SAFNUM_MULTICAST 2
+#define SAFNUM_UNIMULTICAST 3
+/* labeled BGP RFC3107 */
+#define SAFNUM_LABUNICAST 4
+/* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
+#define SAFNUM_VPNUNICAST 128
+#define SAFNUM_VPNMULTICAST 129
+#define SAFNUM_VPNUNIMULTICAST 130
+
+static struct tok bgp_safi_values[] = {
+ { SAFNUM_RES, "Reserved"},
+ { SAFNUM_UNICAST, "Unicast"},
+ { SAFNUM_MULTICAST, "Multicast"},
+ { SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
+ { SAFNUM_LABUNICAST, "labeled Unicast"},
+ { SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
+ { SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
+ { SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
+ { 0, NULL }
};
-#define bgp_attr_nlri_safi(x) \
- num_or_str(bgpattr_nlri_safi, \
- sizeof(bgpattr_nlri_safi)/sizeof(bgpattr_nlri_safi[0]), (x))
+
+/* well-known community */
+#define BGP_COMMUNITY_NO_EXPORT 0xffffff01
+#define BGP_COMMUNITY_NO_ADVERT 0xffffff02
+#define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
/* RFC1700 address family numbers */
#define AFNUM_INET 1
#define AFNUM_DECNET 13
#define AFNUM_BANYAN 14
#define AFNUM_E164NSAP 15
-
-static const char *afnumber[] = {
- "Reserved", "IPv4", "IPv6", "NSAP", "HDLC",
- "BBN 1822", "802", "E.163", "E.164", "F.69",
- "X.121", "IPX", "Appletalk", "Decnet IV", "Banyan Vines",
- "E.164 with NSAP subaddress",
+/* draft-kompella-ppvpn-l2vpn */
+#define AFNUM_L2VPN 196 /* still to be approved by IANA */
+
+static struct tok bgp_afi_values[] = {
+ { 0, "Reserved"},
+ { AFNUM_INET, "IPv4"},
+ { AFNUM_INET6, "IPv6"},
+ { AFNUM_NSAP, "NSAP"},
+ { AFNUM_HDLC, "HDLC"},
+ { AFNUM_BBN1822, "BBN 1822"},
+ { AFNUM_802, "802"},
+ { AFNUM_E163, "E.163"},
+ { AFNUM_E164, "E.164"},
+ { AFNUM_F69, "F.69"},
+ { AFNUM_X121, "X.121"},
+ { AFNUM_IPX, "Novell IPX"},
+ { AFNUM_ATALK, "Appletalk"},
+ { AFNUM_DECNET, "Decnet IV"},
+ { AFNUM_BANYAN, "Banyan Vines"},
+ { AFNUM_E164NSAP, "E.164 with NSAP subaddress"},
+ { AFNUM_L2VPN, "Layer-2 VPN"},
+ { 0, NULL},
};
-#define af_name(x) \
- (((x) == 65535) ? afnumber[0] : \
- num_or_str(afnumber, \
- sizeof(afnumber)/sizeof(afnumber[0]), (x)))
+static struct tok bgp_extd_comm_subtype_values[] = {
+ { 2, "target"},
+ { 3, "origin"},
+ { 4, "link-BW"},
+ { 0, NULL},
+};
-static const char *
-num_or_str(const char **table, size_t siz, int value)
+static int
+decode_prefix4(const u_char *pd, char *buf, u_int buflen)
{
- static char buf[20];
- if (value < 0 || siz <= value || table[value] == NULL) {
- sprintf(buf, "#%d", value);
- return buf;
- } else
- return table[value];
-}
+ struct in_addr addr;
+ u_int plen;
-static const char *
-bgp_notify_minor(int major, int minor)
-{
- static const char **table;
- int siz;
- static char buf[20];
- const char *p;
-
- if (0 <= major
- && major < sizeof(bgpnotify_minor)/sizeof(bgpnotify_minor[0])
- && bgpnotify_minor[major]) {
- table = bgpnotify_minor[major];
- siz = bgpnotify_minor_siz[major];
- if (0 <= minor && minor < siz && table[minor])
- p = table[minor];
- else
- p = NULL;
- } else
- p = NULL;
- if (p == NULL) {
- sprintf(buf, "#%d", minor);
- return buf;
- } else
- return p;
+ plen = pd[0];
+ if (plen < 0 || 32 < plen)
+ return -1;
+
+ memset(&addr, 0, sizeof(addr));
+ memcpy(&addr, &pd[1], (plen + 7) / 8);
+ if (plen % 8) {
+ ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
+ ((0xff00 >> (plen % 8)) & 0xff);
+ }
+ snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
+ return 1 + (plen + 7) / 8;
}
static int
-decode_prefix4(const u_char *pd, char *buf, int buflen)
+decode_labeled_prefix4(const u_char *pd, char *buf, u_int buflen)
{
struct in_addr addr;
- int plen;
+ u_int plen;
+
+ plen = pd[0]; /* get prefix length */
+
+ /* this is one of the weirdnesses of rfc3107
+ the label length (actually the label + COS bits)
+ is added of the prefix length;
+ we also do only read out just one label -
+ there is no real application for advertisment of
+ stacked labels in a a single BGP message
+ */
+
+ plen-=24; /* adjust prefixlen - labellength */
- plen = pd[0];
if (plen < 0 || 32 < plen)
return -1;
memset(&addr, 0, sizeof(addr));
- memcpy(&addr, &pd[1], (plen + 7) / 8);
+ memcpy(&addr, &pd[4], (plen + 7) / 8);
if (plen % 8) {
((u_char *)&addr)[(plen + 7) / 8 - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
- sprintf(buf, "%s/%d", getname((char *)&addr), plen);
- return 1 + (plen + 7) / 8;
+ /* the label may get offsetted by 4 bits so lets shift it right */
+ snprintf(buf, buflen, "%s/%d label:%u %s",
+ getname((u_char *)&addr),
+ plen,
+ EXTRACT_24BITS(pd+1)>>4,
+ ((pd[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+
+ return 4 + (plen + 7) / 8;
}
#ifdef INET6
static int
-decode_prefix6(const u_char *pd, char *buf, int buflen)
+decode_prefix6(const u_char *pd, char *buf, u_int buflen)
{
struct in6_addr addr;
- int plen;
+ u_int plen;
plen = pd[0];
if (plen < 0 || 128 < plen)
addr.s6_addr[(plen + 7) / 8 - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
- sprintf(buf, "%s/%d", getname6((char *)&addr), plen);
+ snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
return 1 + (plen + 7) / 8;
}
#endif
static void
-bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len)
+bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
{
int i;
u_int16_t af;
u_int8_t safi, snpa;
int advance;
int tlen;
- const char *s;
- const u_char *p;
- char buf[256];
+ const u_char *tptr;
+ char buf[MAXHOSTNAMELEN + 100];
- p = dat;
+ tptr = pptr;
+ tlen=len;
switch (attr->bgpa_type) {
case BGPTYPE_ORIGIN:
if (len != 1)
- printf(" invalid len");
+ printf("invalid len");
else
- printf(" %s", bgp_attr_origin(p[0]));
+ printf("%s", tok2str(bgp_origin_values, "Unknown Origin Typecode", tptr[0]));
break;
case BGPTYPE_AS_PATH:
if (len % 2) {
- printf(" invalid len");
+ printf("invalid len");
+ break;
+ }
+ if (!len) {
+ printf("empty");
break;
+ }
+ while (tptr < pptr + len) {
+ /*
+ * under RFC1965, p[0] means:
+ * 1: AS_SET 2: AS_SEQUENCE
+ * 3: AS_CONFED_SET 4: AS_CONFED_SEQUENCE
+ */
+ if (tptr[0] == 3 || tptr[0] == 4)
+ printf("confed");
+ printf("%s", (tptr[0] & 1) ? "{" : "");
+ for (i = 0; i < tptr[1] * 2; i += 2) {
+ printf("%s%u", i == 0 ? "" : " ",
+ EXTRACT_16BITS(&tptr[2 + i]));
+ }
+ printf("%s", (tptr[0] & 1) ? "}" : "");
+ tptr += 2 + tptr[1] * 2;
}
- for (i = 0; i < len; i += 2)
- printf(" %u", ntohs(*(u_int16_t *)&p[i]));
break;
case BGPTYPE_NEXT_HOP:
if (len != 4)
- printf(" invalid len");
+ printf("invalid len");
else
- printf(" %s", getname(p));
+ printf("%s", getname(tptr));
break;
case BGPTYPE_MULTI_EXIT_DISC:
case BGPTYPE_LOCAL_PREF:
if (len != 4)
- printf(" invalid len");
+ printf("invalid len");
else
- printf(" %u", (u_int32_t)ntohl(*(u_int32_t *)p));
+ printf("%u", EXTRACT_32BITS(tptr));
break;
case BGPTYPE_ATOMIC_AGGREGATE:
if (len != 0)
- printf(" invalid len");
+ printf("invalid len");
break;
case BGPTYPE_AGGREGATOR:
if (len != 6) {
- printf(" invalid len");
+ printf("invalid len");
break;
}
- printf(" AS #%u, origin %s", ntohs(*(u_int16_t *)p),
- getname(p + 2));
+ printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
+ getname(tptr + 2));
break;
- case BGPTYPE_MP_REACH_NLRI:
- af = ntohs(*(u_int16_t *)p);
- safi = p[2];
- if (safi >= 128)
- printf(" %s vendor specific,", af_name(af));
- else {
- printf(" %s %s,", af_name(af),
- bgp_attr_nlri_safi(safi));
+ case BGPTYPE_COMMUNITIES:
+ if (len % 4) {
+ printf("invalid len");
+ break;
}
- p += 3;
+ while (tlen>0) {
+ u_int32_t comm;
+ comm = EXTRACT_32BITS(tptr);
+ switch (comm) {
+ case BGP_COMMUNITY_NO_EXPORT:
+ printf(" NO_EXPORT");
+ break;
+ case BGP_COMMUNITY_NO_ADVERT:
+ printf(" NO_ADVERTISE");
+ break;
+ case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
+ printf(" NO_EXPORT_SUBCONFED");
+ break;
+ default:
+ printf("%u:%u%s",
+ (comm >> 16) & 0xffff,
+ comm & 0xffff,
+ (tlen>4) ? ", " : "");
+ break;
+ }
+ tlen -=4;
+ tptr +=4;
+ }
+ break;
+ case BGPTYPE_ORIGINATOR_ID:
+ if (len != 4) {
+ printf("invalid len");
+ break;
+ }
+ printf("%s",getname(tptr));
+ break;
+ case BGPTYPE_CLUSTER_LIST:
+ while (tlen>0) {
+ printf("%s%s",
+ getname(tptr),
+ (tlen>4) ? ", " : "");
+ tlen -=4;
+ tptr +=4;
+ }
+ break;
+ case BGPTYPE_MP_REACH_NLRI:
+ af = EXTRACT_16BITS(tptr);
+ safi = tptr[2];
+
+ printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
+ tok2str(bgp_afi_values, "Unknown AFI", af),
+ af,
+ (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
+ tok2str(bgp_safi_values, "Unknown SAFI", safi),
+ safi);
if (af == AFNUM_INET)
;
else if (af == AFNUM_INET6)
;
#endif
- else
- break;
+ else {
+ printf("\n\t no AFI %u decoder",af);
+ if (!vflag)
+ print_unknown_data(tptr,"\n\t ",tlen);
+ break;
+ }
- tlen = p[0];
- if (tlen) {
- printf(" nexthop");
- if (af == AFNUM_INET)
- advance = 4;
-#ifdef INET6
- else if (af == AFNUM_INET6)
- advance = 16;
-#endif
+ tptr +=3;
+
+ tlen = tptr[0];
+ tptr++;
- for (i = 0; i < tlen; i += advance) {
- if (af == AFNUM_INET)
- printf(" %s", getname(p + 1 + i));
+ if (tlen) {
+ printf("\n\t nexthop: ");
+ while (tlen > 0) {
+ switch (af) {
+ case AFNUM_INET:
+ switch(safi) {
+ case SAFNUM_UNICAST:
+ case SAFNUM_MULTICAST:
+ case SAFNUM_UNIMULTICAST:
+ case SAFNUM_LABUNICAST:
+ printf("%s", getname(tptr));
+ tlen -= sizeof(struct in_addr);
+ tptr += sizeof(struct in_addr);
+ break;
+ default:
+ printf("no SAFI %u decoder",safi);
+ if (!vflag)
+ print_unknown_data(tptr,"\n\t ",tlen);
+ break;
+ }
+ break;
#ifdef INET6
- else if (af == AFNUM_INET6)
- printf(" %s", getname6(p + 1 + i));
+ case AFNUM_INET6:
+ switch(safi) {
+ case SAFNUM_UNICAST:
+ case SAFNUM_MULTICAST:
+ case SAFNUM_UNIMULTICAST:
+ case SAFNUM_LABUNICAST:
+ printf("%s", getname6(tptr));
+ tlen -= sizeof(struct in6_addr);
+ tptr += sizeof(struct in6_addr);
+ break;
+ default:
+ printf("no SAFI %u decoder",safi);
+ if (!vflag)
+ print_unknown_data(tptr,"\n\t ",tlen);
+ break;
+ }
#endif
+ default:
+ printf("no AFI %u decoder",af);
+ if (!vflag)
+ print_unknown_data(tptr,"\n\t ",tlen);
+ break;
+ }
}
- printf(",");
}
- p += 1 + tlen;
+ tptr += tlen;
+
+ snpa = tptr[0];
+ tptr++;
- snpa = p[0];
- p++;
if (snpa) {
- printf(" %u snpa", snpa);
+ printf("\n\t %u SNPA", snpa);
for (/*nothing*/; snpa > 0; snpa--) {
- printf("(%d bytes)", p[0]);
- p += p[0] + 1;
+ printf("\n\t %d bytes", tptr[0]);
+ tptr += tptr[0] + 1;
}
- printf(",");
- }
-
- printf(" NLRI");
- while (len - (p - dat) > 0) {
- if (af == AFNUM_INET)
- advance = decode_prefix4(p, buf, sizeof(buf));
+ } else {
+ printf(", no SNPA");
+ }
+
+ while (len - (tptr - pptr) > 0) {
+ switch (af) {
+ case AFNUM_INET:
+ switch (safi) {
+ case SAFNUM_UNICAST:
+ case SAFNUM_MULTICAST:
+ case SAFNUM_UNIMULTICAST:
+ advance = decode_prefix4(tptr, buf, sizeof(buf));
+ printf("\n\t %s", buf);
+ break;
+ case SAFNUM_LABUNICAST:
+ advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
+ printf("\n\t %s", buf);
+ break;
+ default:
+ printf("\n\t no SAFI %u decoder",safi);
+ if (!vflag)
+ print_unknown_data(tptr-3,"\n\t ",tlen);
+ advance = 0;
+ tptr = pptr + len;
+ break;
+ }
+ break;
#ifdef INET6
- else if (af == AFNUM_INET6)
- advance = decode_prefix6(p, buf, sizeof(buf));
+ case AFNUM_INET6:
+ switch (safi) {
+ case SAFNUM_UNICAST:
+ case SAFNUM_MULTICAST:
+ case SAFNUM_UNIMULTICAST:
+ advance = decode_prefix6(tptr, buf, sizeof(buf));
+ printf("\n\t %s", buf);
+ break;
+ default:
+ printf("\n\t no SAFI %u decoder ",safi);
+ if (!vflag)
+ print_unknown_data(tptr-3,"\n\t ",tlen);
+ advance = 0;
+ tptr = ptr + len;
+ break;
+ }
+ break;
#endif
- printf(" %s", buf);
+ default:
+ printf("\n\t no AFI %u decoder ",af);
+ if (!vflag)
+ print_unknown_data(tptr-3,"\n\t ",tlen);
+ advance = 0;
+ tptr = pptr + len;
+ break;
+ }
- p += advance;
+ tptr += advance;
}
break;
case BGPTYPE_MP_UNREACH_NLRI:
- af = ntohs(*(u_int16_t *)p);
- safi = p[2];
- if (safi >= 128)
- printf(" %s vendor specific,", af_name(af));
- else {
- printf(" %s %s,", af_name(af),
- bgp_attr_nlri_safi(safi));
- }
- p += 3;
+ af = EXTRACT_16BITS(tptr);
+ safi = tptr[2];
+
+ printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
+ tok2str(bgp_afi_values, "Unknown AFI", af),
+ af,
+ (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
+ tok2str(bgp_safi_values, "Unknown SAFI", safi),
+ safi);
+
+ tptr += 3;
+
+ while (len - (tptr - pptr) > 0) {
+ switch (af) {
+ case AFNUM_INET:
+ switch (safi) {
+ case SAFNUM_UNICAST:
+ case SAFNUM_MULTICAST:
+ case SAFNUM_UNIMULTICAST:
+ advance = decode_prefix4(tptr, buf, sizeof(buf));
+ printf("\n\t %s", buf);
+ break;
+ case SAFNUM_LABUNICAST:
+ advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
+ printf("\n\t %s", buf);
+ break;
+ default:
+ printf("\n\t no SAFI %u decoder",safi);
+ if (!vflag)
+ print_unknown_data(tptr-3,"\n\t ",tlen);
+ advance = 0;
+ tptr = pptr + len;
+ break;
+ }
+ break;
- printf(" Withdraw");
- while (len - (p - dat) > 0) {
- if (af == AFNUM_INET)
- advance = decode_prefix4(p, buf, sizeof(buf));
#ifdef INET6
- else if (af == AFNUM_INET6)
- advance = decode_prefix6(p, buf, sizeof(buf));
+ case AFNUM_INET6:
+ switch (safi) {
+ case SAFNUM_UNICAST:
+ case SAFNUM_MULTICAST:
+ case SAFNUM_UNIMULTICAST:
+ advance = decode_prefix6(tptr, buf, sizeof(buf));
+ printf("\n\t %s", buf);
+ break;
+ default:
+ printf("\n\t no SAFI %u decoder",safi);
+ if (!vflag)
+ print_unknown_data(tptr-3,"\n\t ",tlen);
+ advance = 0;
+ tptr = pptr + len;
+ break;
+ }
+ break;
#endif
- printf(" %s", buf);
+ default:
+ printf("\n\t no AFI %u decoder",af);
+ if (!vflag)
+ print_unknown_data(tptr-3,"\n\t ",tlen);
+ advance = 0;
+ tptr = pptr + len;
+ break;
+ }
- p += advance;
+ tptr += advance;
}
break;
+ case BGPTYPE_EXTD_COMMUNITIES:
+ if (len % 8) {
+ printf("invalid len");
+ break;
+ }
+ while (tlen>0) {
+ u_int8_t extd_comm,extd_comm_type,extd_comm_subtype;
+ extd_comm=*tptr;
+ extd_comm_type=extd_comm&0x3f;
+ extd_comm_subtype=*(tptr+1);
+ switch(extd_comm_type) {
+ case 0:
+ printf("%s%s%s:%u:%s%s",
+ (extd_comm&0x80) ? "vendor-specific: " : "",
+ (extd_comm&0x40) ? "non-transitive:" : "",
+ tok2str(bgp_extd_comm_subtype_values,
+ "unknown",
+ extd_comm_subtype&0x3f),
+ EXTRACT_16BITS(tptr+2),
+ getname(tptr+4),
+ (tlen>8) ? ", " : "");
+ break;
+ case 1:
+ printf("%s%s%s:%s:%u%s",
+ (extd_comm&0x80) ? "vendor-specific: " : "",
+ (extd_comm&0x40) ? "non-transitive:" : "",
+ tok2str(bgp_extd_comm_subtype_values,
+ "unknown",
+ extd_comm_subtype&0x3f),
+ getname(tptr+2),
+ EXTRACT_16BITS(tptr+6),
+ (tlen>8) ? ", " : "");
+ break;
+ case 2:
+ printf("%s%s%s:%u:%u%s",
+ (extd_comm&0x80) ? "vendor-specific: " : "",
+ (extd_comm&0x40) ? "non-transitive:" : "",
+ tok2str(bgp_extd_comm_subtype_values,
+ "unknown",
+ extd_comm_subtype&0x3f),
+ EXTRACT_32BITS(tptr+2),
+ EXTRACT_16BITS(tptr+6),
+ (tlen>8) ? ", " : "");
+ break;
+
+ default:
+ printf("\n\t no typecode %u decoder",
+ extd_comm_type);
+ print_unknown_data(tptr,"\n\t ",8);
+ break;
+ }
+ tlen -=8;
+ tptr +=8;
+ }
+ break;
+
default:
- break;
+ printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
+ if (!vflag)
+ print_unknown_data(pptr,"\n\t ",len);
+ break;
}
+ if (vflag&&len) /* omit zero length attributes*/
+ print_unknown_data(pptr,"\n\t ",len);
}
static void
bgp_open_print(const u_char *dat, int length)
{
struct bgp_open bgpo;
+ struct bgp_opt bgpopt;
int hlen;
+ const u_char *opt;
+ int i,cap_type,cap_len;
- memcpy(&bgpo, dat, sizeof(bgpo));
+ TCHECK2(dat[0], BGP_OPEN_SIZE);
+ memcpy(&bgpo, dat, BGP_OPEN_SIZE);
hlen = ntohs(bgpo.bgpo_len);
- printf(": Version %d,", bgpo.bgpo_version);
- printf(" AS #%u,", ntohs(bgpo.bgpo_myas));
- printf(" Holdtime %u,", ntohs(bgpo.bgpo_holdtime));
- printf(" ID %s,", getname((char *)&bgpo.bgpo_id));
- printf(" Option length %u", bgpo.bgpo_optlen);
+ printf("\n\t Version %d, ", bgpo.bgpo_version);
+ printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
+ printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
+ printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
+ printf("\n\t Optional parameters, length %u", bgpo.bgpo_optlen);
+
+ /* ugly! */
+ opt = &((const struct bgp_open *)dat)->bgpo_optlen;
+ opt++;
+
+ i = 0;
+ while (i < bgpo.bgpo_optlen) {
+ TCHECK2(opt[i], BGP_OPT_SIZE);
+ memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
+ if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
+ printf("\n\t Option %d, length %d", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
+ break;
+ }
+
+ printf("\n\t Option %s (%u), length %d",
+ tok2str(bgp_opt_values,"Unknown", bgpopt.bgpopt_type),
+ bgpopt.bgpopt_type,
+ bgpopt.bgpopt_len);
+
+ /* now lets decode the options we know*/
+ switch(bgpopt.bgpopt_type) {
+ case BGP_OPT_CAP:
+ cap_type=opt[i+BGP_OPT_SIZE];
+ cap_len=opt[i+BGP_OPT_SIZE+1];
+ printf("\n\t %s, length %u",
+ tok2str(bgp_capcode_values,"Unknown", cap_type),
+ cap_len);
+ switch(cap_type) {
+ case BGP_CAPCODE_MP:
+ printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
+ tok2str(bgp_afi_values,"Unknown", EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)),
+ EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
+ tok2str(bgp_safi_values,"Unknown", opt[i+BGP_OPT_SIZE+5]),
+ opt[i+BGP_OPT_SIZE+5]);
+ break;
+ case BGP_CAPCODE_RR:
+ case BGP_CAPCODE_RR_CISCO:
+ break;
+ default:
+ printf("\n\t\tno decoder for Capability %u",
+ cap_type);
+ break;
+ }
+ break;
+ case BGP_OPT_AUTH:
+ default:
+ printf("\n\t no decoder for option %u",
+ bgpopt.bgpopt_type);
+ break;
+ }
+
+ i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
+ }
+ return;
+trunc:
+ printf("[|BGP]");
}
static void
int hlen;
const u_char *p;
int len;
- int i, j;
- int newline;
+ int i;
- memcpy(&bgp, dat, sizeof(bgp));
+ TCHECK2(dat[0], BGP_SIZE);
+ memcpy(&bgp, dat, BGP_SIZE);
hlen = ntohs(bgp.bgp_len);
p = dat + BGP_SIZE; /*XXX*/
- printf(":");
/* Unfeasible routes */
- len = ntohs(*(u_int16_t *)p);
+ len = EXTRACT_16BITS(p);
if (len) {
- printf(" (Withdrawn routes: %d bytes)", len);
+ /*
+ * Without keeping state from the original NLRI message,
+ * it's not possible to tell if this a v4 or v6 route,
+ * so only try to decode it if we're not v6 enabled.
+ */
+#ifdef INET6
+ printf("\n\t Withdrawn routes: %d bytes", len);
+#else
+ char buf[MAXHOSTNAMELEN + 100];
+
+ TCHECK2(p[2], len);
+ i = 2;
+
+ printf("\n\t Withdrawn routes:");
+
+ while(i < 2 + len) {
+ i += decode_prefix4(&p[i], buf, sizeof(buf));
+ printf("\n\t %s", buf);
+ }
+#endif
}
p += 2 + len;
- len = ntohs(*(u_int16_t *)p);
+ TCHECK2(p[0], 2);
+ len = EXTRACT_16BITS(p);
if (len) {
/* do something more useful!*/
i = 2;
- printf(" (Path attributes:"); /* ) */
- newline = 0;
while (i < 2 + len) {
int alen, aoff;
+ TCHECK2(p[i], sizeof(bgpa));
memcpy(&bgpa, &p[i], sizeof(bgpa));
alen = bgp_attr_len(&bgpa);
aoff = bgp_attr_off(&bgpa);
- if (vflag && newline)
- printf("\n\t\t");
- else
- printf(" ");
- printf("("); /* ) */
- printf("%s", bgp_attr_type(bgpa.bgpa_type));
+ printf("\n\t %s (%u), length: %u",
+ tok2str(bgp_attr_values, "Unknown Attribute", bgpa.bgpa_type),
+ bgpa.bgpa_type,
+ alen);
+
if (bgpa.bgpa_flags) {
- printf("[%s%s%s%s]",
+ printf(", flags [%s%s%s%s",
bgpa.bgpa_flags & 0x80 ? "O" : "",
bgpa.bgpa_flags & 0x40 ? "T" : "",
bgpa.bgpa_flags & 0x20 ? "P" : "",
- bgpa.bgpa_flags & 0x00 ? "E" : "");
+ bgpa.bgpa_flags & 0x10 ? "E" : "");
+ if (bgpa.bgpa_flags & 0xf)
+ printf("+%x", bgpa.bgpa_flags & 0xf);
+ printf("]: ");
}
-
bgp_attr_print(&bgpa, &p[i + aoff], alen);
- newline = 1;
-
-#if 0
- default:
- proto_tree_add_text(subtree2, p - pd + i + aoff, alen,
- "Unknown (%d bytes)", alen);
- break;
- }
-#endif
-
- /* ( */
- printf(")");
-
i += aoff + alen;
}
-
- /* ( */
- printf(")");
}
p += 2 + len;
+ if (dat + length > p) {
+ printf("\n\t Updated routes:");
+ while (dat + length > p) {
+ char buf[MAXHOSTNAMELEN + 100];
+ i = decode_prefix4(p, buf, sizeof(buf));
+ printf("\n\t %s", buf);
+ if (i < 0)
+ break;
+ p += i;
+ }
+ }
+ return;
+trunc:
+ printf("[|BGP]");
}
static void
struct bgp_notification bgpn;
int hlen;
- memcpy(&bgpn, dat, sizeof(bgpn));
+ TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
+ memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
hlen = ntohs(bgpn.bgpn_len);
- printf(": error %s,", bgp_notify_major(bgpn.bgpn_major));
- printf(" subcode %s",
- bgp_notify_minor(bgpn.bgpn_major, bgpn.bgpn_minor));
+ printf(", Error - %s", tok2str(bgp_notify_major_values, "Unknown", bgpn.bgpn_major));
+
+ switch (bgpn.bgpn_major) {
+
+ case BGP_NOTIFY_MAJOR_MSG:
+ printf(" subcode %s", tok2str(bgp_notify_minor_msg_values, "Unknown", bgpn.bgpn_minor));
+ break;
+ case BGP_NOTIFY_MAJOR_OPEN:
+ printf(" subcode %s", tok2str(bgp_notify_minor_open_values, "Unknown", bgpn.bgpn_minor));
+ break;
+ case BGP_NOTIFY_MAJOR_UPDATE:
+ printf(" subcode %s", tok2str(bgp_notify_minor_update_values, "Unknown", bgpn.bgpn_minor));
+ break;
+ default:
+ break;
+ }
+
+ return;
+trunc:
+ printf("[|BGP]");
}
static void
-bgp_header_print(const u_char *dat, int length, int newline)
+bgp_header_print(const u_char *dat, int length)
{
struct bgp bgp;
- memcpy(&bgp, dat, sizeof(bgp));
- printf(newline ? "\n\t" : " ");
- printf("(%s", bgp_type(bgp.bgp_type)); /* ) */
+ TCHECK2(dat[0], BGP_SIZE);
+ memcpy(&bgp, dat, BGP_SIZE);
+ printf("\n\t%s Message (%u), length: %u ",
+ tok2str(bgp_msg_values, "Unknown", bgp.bgp_type),
+ bgp.bgp_type,
+ length);
switch (bgp.bgp_type) {
case BGP_OPEN:
case BGP_NOTIFICATION:
bgp_notification_print(dat, length);
break;
+ case BGP_KEEPALIVE:
+ break;
+ default:
+ /* we have no decoder for the BGP message */
+ printf("\n\t no Message %u decoder",bgp.bgp_type);
+ print_unknown_data(dat,"\n\t ",length);
+ break;
}
-
- /* ( */
- printf(")");
+ return;
+trunc:
+ printf("[|BGP]");
}
void
{
const u_char *p;
const u_char *ep;
+ const u_char *start;
const u_char marker[] = {
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
};
struct bgp bgp;
u_int16_t hlen;
- int newline;
ep = dat + length;
if (snapend < dat + length)
printf(": BGP");
p = dat;
- newline = 0;
+ start = p;
while (p < snapend) {
if (!TTEST2(p[0], 1))
break;
/* found BGP header */
TCHECK2(p[0], BGP_SIZE); /*XXX*/
- memcpy(&bgp, p, sizeof(bgp));
+ memcpy(&bgp, p, BGP_SIZE);
+
+ if (start != p)
+ printf(" [|BGP]");
hlen = ntohs(bgp.bgp_len);
+
if (TTEST2(p[0], hlen)) {
- bgp_header_print(p, hlen, vflag ? newline : 0);
- newline = 1;
+ bgp_header_print(p, hlen);
p += hlen;
+ start = p;
} else {
- printf(" [|BGP %s]", bgp_type(bgp.bgp_type));
+ printf("[|BGP %s]", tok2str(bgp_msg_values, "Unknown Message Type",bgp.bgp_type));
break;
}
}
trunc:
printf(" [|BGP]");
}
+
+
+
+
+
+
+
+
+
+
+
projects / tcpdump / blobdiff